Testing positive by itself means very little with respect to own’s own health.
Testing looks for the presence of the virus.
Take me to the person most immune to Covid in the entire world and if that person then breathes in particles with Covid virions that person should test positive for Covid.
Does a positive test on such a contaminated person prove that either the person’s vaccination or natural immunity failed? No, it does not.
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He got tested because he had symptoms. If he had symptoms it’s because the vaccine failed to prevent the virus from infecting him and allowed it to replicate.